#62 Solvay Conference 1927 - you had to have been a Noble Prize winner to sit in the front row. The youngest person in the last row, 3rd from the right, is Werner Heisenberg, of the Heisenberg Uncertainty Principle. There is very famous quote from this conference. Albert Einstein (front row, center), when he heard Heisenberg's presentation harrumphed, "God does not play dice". What is less well know is that Neils Bohr said, "Albert, stop telling god what to do with his dice". (Einstein and Bohr were best friends).